Why Henan Deman Packing’s 100% Bright Polyester Bag-Closing Thread Delivers Unbeatable Value

At Henan Deman Packing Co., Ltd., we understand that in today’s fast-paced packaging industry, every cent counts—and so does every stitch. That’s why our 100% bright polyester (PET) bag-closing thread is engineered not just to meet, but to exceed, the demanding needs of modern manufacturers. Here’s why choosing Deman’s premium thread is the smartest investment you can make.

  • Premium Raw Material: Bright vs. Semi-Dull Staple Fiber

  • Superior Fiber Luster and Consistency
    We source 100% bright polyester staple fiber, which offers a higher degree of crystallinity and uniformity compared to the semi-dull fibers commonly used by others. That translates to:

    • Brighter appearance—enhancing the visual quality of sealed bags.

    • Tighter molecular structure—yielding consistently smooth surfaces and fewer weak spots.

  • Higher Tensile Strength
    At equivalent thread thickness, Deman’s bright-fiber thread registers approximately 10% greater breaking strength than the market average. This means fewer thread breaks on high-speed machines and less downtime for your production line.

  • Rigorous Quality Control Under ISO Management

  • ISO 9001:2015–Certified Process
    From raw-material inspection to final spooling, every step is governed by our ISO-certified quality management system.

  • 100% In-Line Testing

    • Tensile‐strength checks on every bobbin

    • Diameter and twist uniformity measurements

    • Visual inspection for color consistency and absence of neps or fluffs

  • Traceability
    Batch numbers and detailed test reports accompany every shipment, ensuring you always know exactly what you received—and why it will perform.

100% In Line Testing

ISO 9001:2015

  • Food-Grade Safety for Global Markets

  • EU Regulation No. 10/2011 Compliance
    Our thread has been tested and approved for indirect food contact under the European Union’s stringent “Plastics in Food Contact” framework.

  • FDA CFR Title 21 Conformity
    Meets U.S. Food and Drug Administration guidelines for materials in contact with food.

  • Non-Toxic, Non-Migratory
    Our polyester formulation passes migration tests, ensuring no harmful substances transfer to your packaged goods—ideal for food-grade bag closures in grains, powders, and granular foods.

  • Universal Compatibility with High-Speed Bag Sewing Machinery

Deman’s thread is perfectly tuned for the world’s leading bag-closing machines:

  • FISCHBEIN (e.g., Model F100)

  • NEWLONG (e.g., Model Ds-9)

  • UNION SPECIAL

  • YAO-HAN,WAIG and more

  • With precise control over twist, lubrication, and diameter, you’ll experience smooth feeding, minimal tension spikes, and virtually no jams—even at line speeds exceeding 300 bags per minute.

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DEMAN PACKING

Leading manufacturer of premium industrial polyester thread. Main products : Polyester bag sewing thread . Polyester spun yarn.

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